Pump



w G. EFMQCRACKEN PUMP Original Filed April 5. 1923 FIGURE 2 a "2 v V meme 1 INVENi'OR Patented Aug. 24, 1926.

UNITED STATES PATENT OFFICE.

PUMP.

Original application filed April 5, 1923, Serial No. 630,076.

Divided and this application filed October 20, 1925. Serial No. 63,675.

Inpumping oil from deep wells it is customary to use a plunger pump provided with a ball valve, the said pump being reciprocated in a tubular discharge column.

In the type of pump now commonly used sand is permitted to gather in pockets in the outside surface of the plunger, thereby spring the opposing surfaces of the discharge pipe and plunger, materially reducing their effective lives and adding materially to the cost of equipment by their necessary constant replacement,

It is one object of the invention to provide a plunger pump for the purpose specified that is so constructed as to effectually prevent the gathering of an erosive material between the plunger and the discharge casing in which it works.

It is another object of my invention to provide a device of the character indicated that will be simple in form and construction, economical to manufacture, durable, and highly etli-cient in its practical application.

Reference is hereby made to my copending application Serial No. 630,076, filed April 5, 1923.

In the drawing Figure 1 is a longitudinal section through my improved pump, parts being broken away.

Figure 2 is a section on line 22 Figure 1.

Referring more particularly to the drawing, I show at l the body portion of the plunger, threaded at 2 to engage a sucker rod not shown and externally threaded at its lower end as at 3.

In plunger 1 is mounted a ball check valve 4.

At 5 I show a sleeve having a bevelled upper edge 6 and internally threaded as at 7 to engage the threaded end 3 of element 1.

Intermediate the ends of sleeve 5 is formed an inwardly extending flange S to form a stop and seat for element 1.

Assuming that the pump is in full operation, the oil is moved upwardly through the check valve 4. In reciprocating, sand or other erosive material has no opportunity to lodge between the casing 9 and the plunger and consequently the life of the instrument is greatly prolonged.

An exceedingly valuable feature of this construction is its simplicity and the ease with which it may be assembled and disassembled. The assembling is the work of but a moment requiring only threading sleeve 5 into position on element 1 against flange 8.

It is to be understood, of course, that while I have herein shown and described but one specific embodiment of the invention, changes in form and construction may be made within the scope of the appended claim.

I claim A plunger pump element consisting of a sleeve adapted to reciprocate in a dist-barge pipe and having an inwardly extending flan e formed thereon intermediate its ends, one of said ends being bevelled and the sleeve being internally threaded between said flange and said bevelled end.

GEO. E. MGCRACKEN. 

